20520128841 has 8 divisors (see below), whose sum is σ = 27524005824. Its totient is φ = 13598168880.

The previous prime is 20520128833. The next prime is 20520128861. The reversal of 20520128841 is 14882102502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20520128841 - 2³ = 20520128833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20520128831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20478670 + ... + 20479671.

It is an arithmetic number, because the mean of its divisors is an integer number (3440500728).

Almost surely, 2^20520128841 is an apocalyptic number.

It is an amenable number.

20520128841 is a deficient number, since it is larger than the sum of its proper divisors (7003876983).

20520128841 is a wasteful number, since it uses less digits than its factorization.

20520128841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40958511.

The product of its (nonzero) digits is 10240, while the sum is 33.

The spelling of 20520128841 in words is "twenty billion, five hundred twenty million, one hundred twenty-eight thousand, eight hundred forty-one".